shall lack
Verbo regular: lack - lacked- lacked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'll lack
you'll lack
he'll lack
we'll lack
you'll lack
they'll lack 	I'll be lacking
you'll be lacking
he'll be lacking
we'll be lacking
you'll be lacking
they'll be lacking	I'll have lacked
you'll have lacked
he'll have lacked
we'll have lacked
you'll have lacked
they'll have lacked	I'll have been lacking
you'll have been lacking
he'll have been lacking
we'll have been lacking
you'll have been lacking
they'll have been lacking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shan't lack
you shan't lack
he shan't lack
we shan't lack
you shan't lack
they shan't lack 	I shan't be lacking
you shan't be lacking
he shan't be lacking
we shan't be lacking
you shan't be lacking
they shan't be lacking	I shan't have lacked
you shan't have lacked
he shan't have lacked
we shan't have lacked
you shan't have lacked
they shan't have lacked	I shan't have been lacking
you shan't have been lacking
he shan't have been lacking
we shan't have been lacking
you shan't have been lacking
they shan't have been lacking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shall I lack?
shall you lack?
shall he lack?
shall we lack?
shall you lack?
shall they lack? 	shall I be lacking?
shall you be lacking?
shall he be lacking?
shall we be lacking?
shall you be lacking?
shall they be lacking? 	shall I have lacked?
shall you have lacked?
shall he have lacked?
shall we have lacked?
shall you have lacked?
shall they have lacked? 	shall I have been lacking?
shall you have been lacking?
shall he have been lacking?
shall we have been lacking?
shall you have been lacking?
shall they have been lacking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shan't I lack?
shan't you lack?
shan't he lack?
shan't we lack?
shan't you lack?
shan't they lack? 	shan't I be lacking?
shan't you be lacking?
shan't he be lacking?
shan't we be lacking?
shan't you be lacking?
shan't they be lacking? 	shan't I have lacked?
shan't you have lacked?
shan't he have lacked?
shan't we have lacked?
shan't you have lacked?
shan't they have lacked? 	shan't I have been lacking?
shan't you have been lacking?
shan't he have been lacking?
shan't we have been lacking?
shan't you have been lacking?
shan't they have been lacking?